1K43 | pdb_00001k43

10 Structure Ensemble of the 14-residue peptide RG-KWTY-NG-ITYE-GR (MBH12)

• PDB DOI: https://doi.org/10.2210/pdb1K43/pdb

• Classification: DE NOVO PROTEIN
• Mutation(s): No 


• Deposited: 2001-10-05 Released: 2001-10-17 
• Deposition Author(s): Pastor, M.T., Lopez de la Paz, M., Lacroix, E., Serrano, L., Perez-Paya, E.

---

Experimental Data Snapshot

• Method: SOLUTION NMR
• Conformers Calculated: 50 
• Conformers Submitted: 10 
• Selection Criteria: structures with the lowest energy 

Literature

Combinatorial approaches: a new tool to search for highly structured beta-hairpin peptides.

Pastor, M.T., Lopez de la Paz, M., Lacroix, E., Serrano, L., Perez-Paya, E.

(2002) Proc Natl Acad Sci U S A 99: 614-619

• PubMed: 11782528 
• DOI: https://doi.org/10.1073/pnas.012583999
• Primary Citation Related Structures: 
  1J4M, 1K43


• PubMed Abstract: 
  

  Here we present a combinatorial approach to evolve a stable beta-hairpin fold in a linear peptide. Starting with a de novo-designed linear peptide that shows a beta-hairpin structure population of around 30%, we selected four positions to build up a combinatorial library of 20(4) sequences. Deconvolution of the library using circular dichroism reduced such a sequence complexity to 36 defined sequences. Circular dichroism and NMR of these peptides resulted in the identification of two linear 14-aa-long peptides that in plain buffered solutions showed a percentage of beta-hairpin structure higher than 70%. Our results show how combinatorial approaches can be used to obtain highly structured peptide sequences that could be used as templates in which functionality can be introduced.

---

Organizational Affiliation: 
• Department of Biochemistry and Molecular Biology, University of València, València, E-46100 Burjassot, Spain.

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors.

Macromolecule Content 

• Total Structure Weight: 1.7 kDa 
• Atom Count: 120 
• Modeled Residue Count: 14 
• Deposited Residue Count: 14 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
MBH12	A	14	N/A	Mutation(s): 0

Experimental Data & Validation

Experimental Data

• Method: SOLUTION NMR
• Conformers Calculated: 50 
• Conformers Submitted: 10 
• Selection Criteria: structures with the lowest energy 

Structure Validation

Entry History 

Deposition Data

• Released Date: 2001-10-17 
Deposition Author(s): Pastor, M.T., Lopez de la Paz, M., Lacroix, E., Serrano, L., Perez-Paya, E.

Revision History  

• Version 1.0: 2001-10-17
  Type: Initial release
  
• Version 1.1: 2008-04-27
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 1.3: 2022-02-23
  Changes: Data collection, Database references, Derived calculations
• Version 1.4: 2024-05-22
  Changes: Data collection